package com.ly.quartz.service.impl;

import java.util.List;
import javax.annotation.PostConstruct;
import javax.annotation.Resource;

import com.ly.common.constant.ScheduleConstants;
import com.ly.common.exception.job.TaskException;
import com.ly.quartz.domain.SysJob;
import com.ly.quartz.mapper.SysJobMapper;
import com.ly.quartz.service.ISysJobService;
import com.ly.quartz.util.CronUtils;
import com.ly.quartz.util.ScheduleUtils;
import org.quartz.JobDataMap;
import org.quartz.JobKey;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**
 * 定时任务调度信息 服务层
 * @author ruoyi
 */
@Service
public class SysJobServiceImpl implements ISysJobService {

    @Resource
    private Scheduler scheduler;

    @Resource
    private SysJobMapper jobMapper;

    /**
     * 项目启动时，初始化定时器 主要是防止手动修改数据库导致未同步到定时任务处理（注：不能手动修改数据库ID和任务组名，否则会导致脏数据）
     */
    @PostConstruct
    public void init () throws SchedulerException, TaskException {
        scheduler.clear ();
        List<SysJob> jobList = jobMapper.selectJobAll ();
        for ( SysJob job : jobList ) {
            ScheduleUtils.createScheduleJob ( scheduler, job );
        }
    }

    /**
     * 获取quartz调度器的计划任务列表
     * @param job 调度信息
     * @return
     */
    @Override
    public List<SysJob> selectJobList (SysJob job) {
        return jobMapper.selectJobList ( job );
    }

    /**
     * 通过调度任务ID查询调度信息
     * @param jobId 调度任务ID
     * @return 调度任务对象信息
     */
    @Override
    public SysJob selectJobById (Long jobId) {
        return jobMapper.selectJobById ( jobId );
    }

    /**
     * 暂停任务
     * @param job 调度信息
     */
    @Override
    @Transactional
    public int pauseJob (SysJob job) throws SchedulerException {
        Long jobId = job.getJobId ();
        String jobGroup = job.getJobGroup ();
        job.setStatus ( ScheduleConstants.Status.PAUSE.getValue () );
        int rows = jobMapper.updateJob ( job );
        if ( rows > 0 ) {
            scheduler.pauseJob ( ScheduleUtils.getJobKey ( jobId, jobGroup ) );
        }
        return rows;
    }

    /**
     * 恢复任务
     * @param job 调度信息
     */
    @Override
    @Transactional
    public int resumeJob (SysJob job) throws SchedulerException {
        Long jobId = job.getJobId ();
        String jobGroup = job.getJobGroup ();
        job.setStatus ( ScheduleConstants.Status.NORMAL.getValue () );
        int rows = jobMapper.updateJob ( job );
        if ( rows > 0 ) {
            scheduler.resumeJob ( ScheduleUtils.getJobKey ( jobId, jobGroup ) );
        }
        return rows;
    }

    /**
     * 删除任务后，所对应的trigger也将被删除
     * @param job 调度信息
     */
    @Override
    @Transactional
    public int deleteJob (SysJob job) throws SchedulerException {
        Long jobId = job.getJobId ();
        String jobGroup = job.getJobGroup ();
        int rows = jobMapper.deleteJobById ( jobId );
        if ( rows > 0 ) {
            scheduler.deleteJob ( ScheduleUtils.getJobKey ( jobId, jobGroup ) );
        }
        return rows;
    }

    /**
     * 批量删除调度信息
     * @param jobIds 需要删除的任务ID
     * @return 结果
     */
    @Override
    @Transactional
    public void deleteJobByIds (Long[] jobIds) throws SchedulerException {
        for ( Long jobId : jobIds ) {
            SysJob job = jobMapper.selectJobById ( jobId );
            deleteJob ( job );
        }
    }

    /**
     * 任务调度状态修改
     * @param job 调度信息
     */
    @Override
    @Transactional
    public int changeStatus (SysJob job) throws SchedulerException {
        int rows = 0;
        String status = job.getStatus ();
        if ( ScheduleConstants.Status.NORMAL.getValue ().equals ( status ) ) {
            rows = resumeJob ( job );
        } else if ( ScheduleConstants.Status.PAUSE.getValue ().equals ( status ) ) {
            rows = pauseJob ( job );
        }
        return rows;
    }

    /**
     * 立即运行任务
     * @param job 调度信息
     */
    @Override
    @Transactional
    public void run (SysJob job) throws SchedulerException {
        Long jobId = job.getJobId ();
        String jobGroup = job.getJobGroup ();
        SysJob properties = selectJobById ( job.getJobId () );
        // 参数
        JobDataMap dataMap = new JobDataMap ();
        dataMap.put ( ScheduleConstants.TASK_PROPERTIES, properties );
        scheduler.triggerJob ( ScheduleUtils.getJobKey ( jobId, jobGroup ), dataMap );
    }

    /**
     * 新增任务
     * @param job 调度信息 调度信息
     */
    @Override
    @Transactional
    public int insertJob (SysJob job) throws SchedulerException, TaskException {
        job.setStatus ( ScheduleConstants.Status.PAUSE.getValue () );
        int rows = jobMapper.insertJob ( job );
        if ( rows > 0 ) {
            ScheduleUtils.createScheduleJob ( scheduler, job );
        }
        return rows;
    }

    /**
     * 更新任务的时间表达式
     * @param job 调度信息
     */
    @Override
    @Transactional
    public int updateJob (SysJob job) throws SchedulerException, TaskException {
        SysJob properties = selectJobById ( job.getJobId () );
        int rows = jobMapper.updateJob ( job );
        if ( rows > 0 ) {
            updateSchedulerJob ( job, properties.getJobGroup () );
        }
        return rows;
    }

    /**
     * 更新任务
     * @param job      任务对象
     * @param jobGroup 任务组名
     */
    public void updateSchedulerJob (SysJob job, String jobGroup) throws SchedulerException, TaskException {
        Long jobId = job.getJobId ();
        // 判断是否存在
        JobKey jobKey = ScheduleUtils.getJobKey ( jobId, jobGroup );
        if ( scheduler.checkExists ( jobKey ) ) {
            // 防止创建时存在数据问题 先移除，然后在执行创建操作
            scheduler.deleteJob ( jobKey );
        }
        ScheduleUtils.createScheduleJob ( scheduler, job );
    }

    /**
     * 校验cron表达式是否有效
     * @param cronExpression 表达式
     * @return 结果
     */
    @Override
    public boolean checkCronExpressionIsValid (String cronExpression) {
        return CronUtils.isValid ( cronExpression );
    }
}
